diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 5df28185..6079fdc4 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -7,6 +7,7 @@ include:
 
 variables:
   project_name: cara
+  PY_VERSION: "3.6"  # This is what we have running in OpenShift currently.
 
 
 # A full installation of CARA, tested with pytest.